I have zero experience with either brand, however, I'd pick the Quicksilver's over the Manley's based upon Quicksilver's strong reputation for customer service, even for 2nd hand gear. Since I buy most of my gear used, this provides piece of mind, and increases resale value. Just as important, the Quickie's also get consistently good reviews from users and proffesional reviewers for excellent sound quality and durability... kind of a can't miss brand, with point to point wiring as a noteworthy bonus.